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2021
Titan Fox V (Hammer King)
Igor Amadeus Cavalera (Go Ahead and Die)
Ryan Van Poederooyen (Imonolith)
Dino Cazares (Fear Factory)
Burning Witches
Esa Halopainen (Amorphis, Silver Lake)
Megan Targett (Vexed)
Terry Nikas (Scar of the Sun, Zero Gravity Studios)
Frontman of Cvlt ov the Svn
Robin McAuley (Black Swan, solo)
Geoff Tate (Sweet Oblivion, solo)
Trollmannen (Trollfest)
James Lascelles (Wheel)
Olof Wikstrand (Enforcer)
Jamie Gowers (As Everything Unfolds)
Magnus Karlsson (Heart Healer, Primal Fear, The Ferrymen)
Mark Jansen (Epica, MaYan)
Jeff Plate (Alta Reign, Trans-Siberian Orchestra)
Anneke van Giersbergen
Billy Sherwood (Arc of Life, Asis, Yes)
Joel Hoekstra (13, TSO, Whitesnake)
Diva Satanica (Nervosa)
Thomas Vikstrom (Therion)
Lanvall (Edenbridge)
Marina La Torraca (Phantom Elite, Exit Eden)
Johannes Persson (Cult of Luna)
Jeff Scott Soto (W.E.T., SOTO, Sons of Apollo)
John Diva (John Diva and the Rockets of Love)
Wolf Hoffmann (Accept, solo)
